A program that manages all other programs in a computer, such as Windows or Unix.
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When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs.
There is a fine line between advertising and spam and unfortunately many business owners do not understand the difference between the two.
You finally realize that you need a good opt-in list. After reading countless articles and sought expert advices and have read many success stories of people creating a small fortune with opt-in lists you finally decide to have one of your own.
